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Finding the Fourth Proportional to 100,342.56, 138,472.92 and 55,630.56

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Solution

The fourth proportional to 100,342.56, 138,472.92 and 55,630.56 is: 76,770.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,342.56 : 138,472.92 = 55,630.56 : x
  2. Step 2: Convert to fraction form
    100,342.56/138,472.92 = 55,630.56/x
  3. Step 3: Cross multiply
    100,342.56x = 138,472.92 × 55,630.56
  4. Step 4: Simplify right side
    100,342.56x = 7,703,326,084.44
  5. Step 5: Solve for x
    x = 7,703,326,084.44/100,342.56
  6. Step 6: Final answer
    x = 76,770.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.